defimpl Altstd.Compact, for: PID do
  @moduledoc since: "0.1.0"

  @doc since: "0.1.0"
  @spec resolve(pid(), keyword) :: Altstd.Compact.resolution_t()
  def resolve(object, _opts \\ []) do
    case Process.alive?(object) do
      false ->
        {:reject, object}

      true ->
        {:resolve, object}
    end
  end

  @doc since: "0.1.0"
  @spec cast(pid(), keyword) :: Altstd.Compact.t()
  def cast(object, opts \\ []) do
    resolution =
      object
      |> Altstd.Compact.resolve(opts)

    case resolution do
      {:resolve, resolved_value} ->
        resolved_value
        |> List.wrap()

      {:reject, _any} ->
        []

      :reject ->
        []

      resolved_value ->
        resolved_value
        |> List.wrap()
    end
  end
end